+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2253 Espinette (1932 PB) Classification: Mars-crossing Asteroid          SPK-ID: 2002253 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 45 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2780101018017156 3.1674e-08   a 2.284156473517209 4.9576e-09 au q 1.649137899783642 7.169e-08 au i 3.87979409826124 3.6725e-06 deg node 143.9147439659578 4.7538e-05 deg peri 175.7956546779038 4.788e-05 deg M 153.8785942308 6.9095e-06 deg tp 2458461.532083547031 (2018-Dec-09.03208355) 2.3268e-05 TDB period 1260.919043957789 3.45 4.1051e-06 1.124e-08 d yr n .2855060376200104 9.295e-10 deg/d Q 2.919175047250776 6.3359e-09 au   Orbit Determination Parameters    # obs. used (total)      2625      data-arc span      32231 days (88.24 yr)      first obs. used      1932-07-30      last obs. used      2020-10-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45978      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:11:14   Additional Information  Earth MOID = .63625 au   Jupiter MOID = 2.40888 au   T_jup = 3.548  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.8   n/a MPO347536   diameter diameter 5.469 km 0.781 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   rotation period rot_per 7.4409 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.] [Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Stephens, R.D. (2016) Minor Planet Bull. 43, 52-56.] [Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.] geometric albedo albedo 0.404   0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   SMASSII spectral type spec_B Sl   n/a Xu et al. (1995) Icarus 115, 1-35   2253 Espinette           Discovered 1932 July 30 by G. Van Biesbroeck at the Yerkes Observatory. Named for the discoverer's residence in Williams Bay, Wisconsin. For many of the 45 years the discoverer worked at the Yerkes Observatory the Van Biesbroecks fed and housed students and visiting astronomers from all over the world. The name originally comes from a small cafe in one of the parks in Brussels. Name proposed by the discoverer's children, Edwin Van Biesbroeck, Simone Van Biesbroeck Titus and Micheline Van Biesbroeck Wilson. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC 6059 Last Updated: 2006-03-21 [ show close-approach data ] Alternate Designations  1932 PB = 1939 RJ = 1953 VB1 = 1970 PM = 1977 TG  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-22 22:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin